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Fauzia Ali
Mapa Mental por , criado more than 1 year ago

A-Level Biology (Gas Exchange) Mapa Mental sobre Gas Exchange- Insects, criado por Fauzia Ali em 24-02-2016.

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Fauzia Ali
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Gas Exchange-InsectsActiveRestingMovements of abdomen ventilatethe tracheaeEnds of tracheoles fluid-filled and closeto muscle fibresInterface where gasexchange takes placeOxygen dissoles in fluid anddiffues directly in muscle cellsNo respiratory pigmentor blood circulationneedCO2 diffuses reverseDiffusion through spiracles, tracheae andtracheolesSame method for O2 and CO2ProblemsLive in arid so water evaporates frombody risking dehydrationGas exchange need thin permeable surfaceconflicts with water conservationInsects therefore have waterproof layer (e.g.exoskeleton with thin waxy layer over thick layerof chitin and proteinStructurePaired holes:spiraclesBranches chitin lined tubes:tracheaeSmalles tubes: tracheolesCan open and close: reduces water lossHairs on spiracles: reduceswater loss and prevents solidparticles enteringClique duas vezes aqui para editar o textoClique e arraste este botão para criar um novo tópico